[解析]
Dear Wu Dong,
I am sorry to hear that you are ill as a result of being fat.You shouldn't have eaten so much food.In fact,you'd better do more sports and build up your body.I am writing to tell you what you should do to recover you health.(高分句型一)
Above all,you should have a wholesome diet by eating more vegetables and fruit because they rich in vitamins and fibre.(高分句型二)Eat less cheese and chocolate which contains much sugar and fat which will make you fat.(高分句型三)In addition,you should exercise regularly and have enough sleep.Don't be too tired.What's more,keeping happy and a balanced diet are as important as sports.
I look forward to seeing a healthy Li Ming soon.
Yours,
Wu Dong